I can help you create a credit note, and we’ll apply it to your invoice.
The good thing about credit notes is they return the count of the inventory items to your books. You can use it when customer cancels their orders or return the items they bought.
First, let’s make sure that the option to automatically apply credits to open transactions is turned off. That way, you can choose which invoice to apply it.
Second, let’s create the credit note:
Third, let’s apply the credit note to the invoice.
You can check your customer's balance after apply the credit note to their invoice.
If you need more help with QuickBooks Online, please feel free to reach back out.